export default {
	
	namespaced:true,
	
	
	state:()=>({
		// 购物车的数组，用来存储购物车中每个商品的信息对象
		    // 每个商品的信息对象，都包含如下 6 个属性：
		    // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
		cart:JSON.parse(uni.getStorageSync('cart') || '[]')
	}),
	
	mutations:{
		addToCart(state,goods){
			const findResult=state.cart.find((x)=>x.goods_id===goods.goods_id)
			// console.log('findResult:'+findResult)
			if(!findResult){
				state.cart.push(goods)
			}
			else{
				findResult.goods_count++
			}
			// console.log(state.cart)
			this.commit('m_cart/saveToStorage')
		},
		saveToStorage(state){
			uni.setStorageSync('cart',JSON.stringify(state.cart))
		},
		//更新购物车中商品的状态
		updateGoodsState(state,goods){
		const findResult=state.cart.find(x=>x.goods_id===goods.goods_id)
		if(findResult){
			findResult.goods_state=goods.goods_state
			this.commit('m_cart/saveToStorage')
		}
		},
		updateGoodsCount(state,goods){
			const findResult=state.cart.find(x => x.goods_id===goods.goods_id)
			
			if(findResult){
				findResult.goods_count=goods.goods_count
				this.commit('m_cart/saveToStorage')
			}
		},
		removeGoodsById(state,goods_id){
			state.cart=state.cart.filter(x=>x.goods_id!==goods_id)
			this.commit('m_cart/saveToStorage')
		},
		updateAllGoodsState(state,newState){
			state.cart.forEach(x => x.goods_state = newState)
			this.commit('m_cart/saveToStorage')
		}
		
	},
	//计算模块
	getters:{
		total(state){
			// let c=0
			// state.cart.forEach(x => c+= x.goods_count)
			// return c
			return state.cart.reduce((total,item) => total+=item.goods_count , 0)
		},
		checkedCount(state){
			return state.cart.filter(x => x.goods_state).reduce((total,item) => total+=item.goods_count,0)
		},
		checkedSGoodsAmount(state){
          return state.cart.filter(x => x.goods_state)
		  .reduce((total,item) => total += item.goods_count*item.goods_price , 0)
		  .toFixed(2)
	}
	}
}